iNSTALLATiON
Commissioning
EN
GL
ISH
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SBB 302 WP (AU) | SBB 401-501 WP SOL (AU) |
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Check the rigidity of the connecting pipe and secure it further
if required.
See chapter “Specification / Hydraulic diagram” for general ar-
rangement in schematic form. You can fit the safety assembly in
various positions to suit the space available but it must be placed
in the same order as shown. The safety assembly provided in the
pack is fitted to the cold water supply with the exception of the T&P
valve which is fitted at the top of the DHW cylinder. DHW cylinder
relief valve connections should not be used for other purpose.
No valve should be fitted between the expansion valve and the
DHW cylinder.
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To obtain a balanced water pressure in the cold water and
DHW lines, position the cold water outlet directly on the out-
let side of the pressure reducing valve.
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The expansion valve should not respond under normal oper-
ating conditions as the expansion vessel will accommodate
the water as it expands during the heating process.
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If a secondary return circuit is used then an additional ex-
pansion vessel may be required.
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Run the expansion valve outlet and that of the T&P valve to a
drain via a tundish. The purpose of the tundish is to let water
be seen should these valves respond. The outlet pipe should
not exceed 9 metres in length without forming an air break,
i.e. tundish. The pipe must fall continuously throughout its
length with no additional 90° bends. It must be heat resist-
ant and discharge to a safe visible position away from any
electrical devices. The pipe diameter must not be smaller
than the valve outlet. The two discharge pipes can be joined
together at the point of discharge into a single tundish if
required.
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Size the drain so that water can drain off unimpeded when
the safety valve is fully opened. The blow-off aperture of the
safety valve must remain open towards the atmosphere.
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Fit the blow-off line of the safety assembly with a constant
slope.
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Observe the information in the installation instructions of the
safety assembly.
9.5 Fitting the thermometer and DHW sensor
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1 Thermometer
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Insert the thermometer as far as it will go and align it.
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Insert the DHW sensor into the upper “Sensor heat pump
DHW” sensor well (recommended position for energy sav-
ing). For higher levels of DHW convenience, you can alter-
natively insert the DHW sensor into the lower “Sensor heat
pump DHW optional” sensor well (higher energy demand).
10. Commissioning
Note
Some fluxes used to solder pipes and fittings need to be
flushed out with hot water. Where this is the case the
cylinder should be heated to its normal operating temper-
ature and all pipe work flushed with hot water to ensure
all flux and debris is removed from the system.
DHW system
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Open all taps.
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Open the shut-off valve in the cold water feed line. Allow
the system to fill and flush out all flux and debris from the
installation.
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Close all taps.
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Open a downstream draw-off point until the appliance has
filled up and the pipes are free of air.
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Check the function of the fitted accessories.
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Check that the DHW temperature on the heat pump control
unit is displayed correctly.
Heating system
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Observe the operating and installation instructions of the
heat pump.
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Vent the indirect coils after filling the heat pump system.
Solar system
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Observe the operating and installation instructions of the
solar pump assembly.
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Vent the indirect coils after filling the solar system.
10.1 Appliance handover
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Explain the appliance function to users and familiarise them
with its operation.
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Make users aware of potential dangers, especially the risk of
scalding.
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Hand over these instructions.
11. Shutting down
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Disconnect the appliance from the mains at the MCB/fuse in
the fuse box.
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Drain the appliance. See chapter “Maintenance / Draining the
appliance”.